LABSCO SUMMARY
LangChain's how-to guides, on hand while your agent writes the code.
It answers the why and the how: concepts, tutorials and product docs across LangChain, LangGraph and LangSmith. LangChain recommends pairing it with its API reference server, which gives the exact class and method details.
What it is
A remote MCP server LangChain offers at docs.langchain.com/mcp. It searches LangChain's public documentation and does not reach your own LangSmith data. It needs no sign-in and no key.
What you get
- The docs searched for guides, code examples and API pages that answer a question
- Exact lookups across the documentation pages and OpenAPI specs, such as finding every page that mentions a term
- A problem with a docs page, such as a broken example, reported to LangChain's docs team
Requirements
An MCP client that can reach a remote address. LangChain gives setup steps for Claude Code, Claude Desktop, Codex CLI, Cursor, VS Code, Antigravity and Deep Agents Code.
Setup effort
Paste a URL — add the endpoint to your client